634680 has 96 divisors (see below), whose sum is σ = 2162160. Its totient is φ = 161280.

The previous prime is 634679. The next prime is 634681. The reversal of 634680 is 86436.

It is an interprime number because it is at equal distance from previous prime (634679) and next prime (634681).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14739 + ... + 14781.

2⁶³⁴⁶⁸⁰ is an apocalyptic number.

634680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081080).

634680 is an abundant number, since it is smaller than the sum of its proper divisors (1527480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634680 is a wasteful number, since it uses less digits than its factorization.

634680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 634680 is about 796.6680613656. The cubic root of 634680 is about 85.9379397223.

The spelling of 634680 in words is "six hundred thirty-four thousand, six hundred eighty".